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eAG Equation:
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The eAG (estimated Average Glucose) equation converts HbA1c percentage to an average glucose value in mg/dL. This helps patients and healthcare providers understand what the HbA1c value means in terms of daily glucose levels.
The calculator uses the eAG equation:
Where:
Explanation: The equation provides an estimated average glucose level that corresponds to the HbA1c measurement over the previous 2-3 months.
Details: Converting HbA1c to eAG helps patients better understand their glucose control in familiar units (mg/dL) and facilitates more effective diabetes management discussions between patients and healthcare providers.
Tips: Enter HbA1c value as a percentage (e.g., 6.5 for 6.5%). The value must be greater than 0.
Q1: What is the relationship between HbA1c and average glucose?
A: HbA1c reflects average blood glucose levels over the past 2-3 months. The eAG equation converts this percentage to an estimated average glucose value in mg/dL.
Q2: How accurate is the eAG calculation?
A: The equation provides a good estimate for most people, but individual variations in red blood cell lifespan and other factors can affect the relationship between HbA1c and average glucose.
Q3: What are typical HbA1c and eAG values?
A: Normal HbA1c is below 5.7% (eAG < 117 mg/dL). Diabetes is diagnosed at HbA1c ≥ 6.5% (eAG ≥ 140 mg/dL).
Q4: Can this calculator be used for diabetes diagnosis?
A: No, this calculator is for educational purposes only. Diabetes diagnosis should be made by a healthcare professional using appropriate diagnostic criteria.
Q5: Are there different equations for different populations?
A: While this is the most commonly used equation, some studies suggest slightly different coefficients may be needed for specific ethnic groups or medical conditions.